<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
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  <body>
    <script>
      //检测昵称是否是有汉字字母数字下划线组成，6-8位

      const str = "妖_yaooo";
      const reg = /^[\u4e00-\u9fa5\w]{6,8}$/;
      console.log(reg.test(str));
    </script>
  </body>
</html>
